Gum brush



FIG. 1 is a view in perspective of the gum brush of the subject design.

FIG. 2 is a side elevation view, the opposite side being a mirror image.

FIG. 3 is a top plan view.

FIG. 4 is a front elevation view.

FIG. 5 is a rear elevation view; and,

FIG. 6 is a bottom plan view.

The broken lines shown in FIGS. 2 and 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a gum brush, as shown and described. 